i know the obama administration is very concerned what these members of the senate are planning on doing. >> no question. this puts congress on a direct collision course with the white house. as you know, they have been lobbying hard, the administration has been lobbying hard against it, secretary kerry, including sending a video message over the holidays arguing against sanctions, saying that will in effect scuttle this deal. what we're seeing now, that intense lobbying campaign appears to have fallen on deaf ears, even among members of the president's own party. with the ink barely dry on the historic nuclear deal with iran, today the iranian foreign minister pronounced it dead if congress passes more economic sanctions. the entire deal is dead, he told "time" magazine. we do not like to negotiate under duress. even so, sources tell cnn republican and democratic senators are close to doing exactly that, nearing agreement on a bill to impose new sanctions within six months unless iran ships all stockpiles of enriched uranium out of the country and dismantles both its heavy water plutoni